1974724cb1
Changing the icon to 'system-log-out-symbolic' has no visual change in a default GNOME setup since both 'system-log-out-symbolic' and 'application-exit-symbolic' are the same in adwaita-icon-theme (at the time of writing), however, other icon themes differentiate between the two icons so pointing to the appropriate icon name is the right thing to do. https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2751 (cherry picked from commit 7d60f418e7575e10617ad066a16cd40b2c28c00a)